Wisconsin

$108+ Cheap flights from Ontario (ONT) to Wisconsin

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/1. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — MKE
Jul 21 — Jul 281
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Cheap flight deals from Ontario to Wisconsin

Cheapest flights from Ontario to Wisconsin
Explore the most affordable flight options available from Ontario to Wisconsin. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 21, 2026.

This Expedia deal was found by Cheapflights users on 6/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/76:00 am
ONT
-
MSP
1 stop13h 27m
Frontier
Wed 7/2210:15 pm
MSP
-
ONT
1 stop27h 35m
Frontier
Deal found 6/16$244
This Booking.com deal was found by Cheapflights users on 6/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/2910:49 am
ONT
-
MSP
1 stop8h 38m
Frontier
Wed 8/510:15 pm
MSP
-
ONT
1 stop27h 35m
Frontier
Deal found 6/18$246
This Frontier deal was found by Cheapflights users on 6/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/2210:49 am
ONT
-
MSP
1 stop8h 38m
Frontier
Tue 8/41:16 pm
MSP
-
ONT
1 stop12h 34m
Frontier
Deal found 6/17$247
This Super.com deal was found by Cheapflights users on 6/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/46:00 am
ONT
-
MSP
1 stop13h 27m
Frontier
Wed 8/1210:15 pm
MSP
-
ONT
1 stop27h 35m
Frontier
Deal found 6/20$250
This Super.com deal was found by Cheapflights users on 6/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/187:56 pm
ONT
-
MSP
1 stop14h 09m
Frontier
Tue 8/259:57 pm
MSP
-
ONT
1 stop14h 07m
Frontier
Deal found 6/20$251
This CheapOair deal was found by Cheapflights users on 6/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/193:40 pm
ONT
-
MSP
1 stop28h 01m
Frontier
Wed 9/29:57 pm
MSP
-
ONT
1 stop27h 58m
Frontier
Deal found 6/20$254
This Frontier deal was found by Cheapflights users on 6/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/910:49 am
ONT
-
MSN
1 stop6h 21m
Frontier
Tue 8/117:55 pm
MSN
-
ONT
1 stop5h 55m
Frontier
Deal found 6/20$254
This Booking.com deal was found by Cheapflights users on 6/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/110:50 am
ONT
-
MSP
1 stop20h 33m
Frontier
Wed 9/210:15 pm
MSP
-
ONT
1 stop27h 34m
Frontier
Deal found 6/18$256
This Expedia deal was found by Cheapflights users on 6/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/146:00 am
ONT
-
MSP
1 stop28h 21m
Frontier
Tue 7/2110:15 pm
MSP
-
ONT
1 stop27h 35m
Frontier
Deal found 6/19$257
This Booking.com deal was found by Cheapflights users on 6/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/296:00 am
ONT
-
MSP
1 stop28h 21m
Frontier
Tue 8/410:15 pm
MSP
-
ONT
1 stop13h 49m
Frontier
Deal found 6/16$259
This Booking.com deal was found by Cheapflights users on 6/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/136:00 am
ONT
-
MSP
1 stop13h 27m
Frontier
Tue 8/189:57 pm
MSP
-
ONT
1 stop27h 58m
Frontier
Deal found 6/18$260
This Super.com deal was found by Cheapflights users on 6/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/111:16 am
ONT
-
MSP
1 stop7h 45m
Frontier
Tue 10/610:58 am
MSP
-
ONT
1 stop14h 57m
Frontier
Deal found 6/18$261

Find flight deals from Ontario to Wisconsin

Keep the following information in mind while searching for Ontario to Wisconsin flight deals. Data was last updated June 21, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$244
(Expedia)

One-way from

$108
(Trip.com)

Popular in

June

Cheapest in

August

Average price

$553
Provider with most accurate pricing for Los Angeles-Milwaukee-Mitchell flight deals.
Provider most trusted by Cheapflights users for Los Angeles-Milwaukee-Mitchell flights.
From Ontario to Wisconsin
One-way flight from Ontario to Wisconsin
Highest demand for flights based on searches. 5% potential increase in price ($24 potential increase over avg. RT price).
Cheapest flight prices on average. 2% potential price decrease ($12 potential savings vs. average RT price).
Average for round-trip flights in June 2026

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Wisconsin that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated June 21, 2026.
Use the filters below to find and compare flights from Ontario to Wisconsin that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioMadison

ONT - MSN

ONTMSN

Ontario

Sun 8/9

10:49 am-7:10 pm

1 stop6h 21m

Madison Truax Field

Tue 8/11

7:55 pm-11:50 pm

1 stop5h 55m

$254

OntarioChicago

ONT - ORD

ONTORD

Ontario

Tue 7/14

6:10 am-12:25 pm

Nonstop4h 15m

Chicago O'Hare Intl

Tue 7/21

8:18 pm-10:51 pm

Nonstop4h 33m

$307

OntarioMadison

ONT - MSN

ONTMSN

Ontario

Thu 8/13

10:49 am-7:10 pm

1 stop6h 21m

Madison Truax Field

Sun 8/16

7:55 pm-11:50 pm

1 stop5h 55m

$309

OntarioChicago

ONT - ORD

ONTORD

Ontario

Thu 8/20

1:06 pm-9:30 pm

1 stop6h 24m

Chicago O'Hare Intl

Mon 8/24

2:00 pm-10:45 pm

2 stops10h 45m

$322

OntarioMadison

ONT - MSN

ONTMSN

Ontario

Tue 8/25

5:00 am-1:13 pm

1 stop6h 13m

Madison Truax Field

Sat 8/29

3:55 pm-10:35 pm

1 stop8h 40m

$331

OntarioMadison

ONT - MSN

ONTMSN

Ontario

Tue 8/25

6:01 pm-8:16 am

2 stops12h 15m

Madison Truax Field

Sat 8/29

6:05 am-12:16 pm

2 stops8h 11m

$342

OntarioAppleton

ONT - ATW

ONTATW

Ontario

Tue 8/18

12:00 pm-10:44 pm

1 stop8h 44m

Appleton Intl

Thu 8/27

5:31 am-10:42 am

1 stop7h 11m

$349

OntarioAppleton

ONT - ATW

ONTATW

Ontario

Tue 8/18

12:00 pm-10:44 pm

1 stop8h 44m

Appleton Intl

Tue 9/1

5:31 am-10:42 am

1 stop7h 11m

$349

OntarioDuluth

ONT - DLH

ONTDLH

Ontario

Thu 10/22

10:59 pm-11:15 am

2 stops10h 16m

Duluth Intl

Mon 10/26

12:00 pm-10:43 pm

2 stops12h 43m

$349

OntarioGreen Bay

ONT - GRB

ONTGRB

Ontario

Thu 9/24

11:59 am-10:29 pm

1 stop8h 30m

Green Bay Austin-Straubel

Tue 10/6

12:30 pm-10:14 pm

2 stops11h 44m

$354

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/20

Showing 1-10 of 60 resultsSorted by cheapest first
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6

Best time to book a flight from Ontario to Wisconsin

Have a flexible travel schedule? Discover the best time to fly to Wisconsin from Ontario with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Ontario to Wisconsin

What is the cheapest month to book a flight from Ontario to Wisconsin?

Currently, June is the cheapest month in which you can book a flight from Ontario to Wisconsin (average of $156). Flying from Ontario to Wisconsin in February is currently the most expensive (average of $369). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

How much does it cost to fly round-trip from Ontario to Wisconsin?

Reviews of airlines servicing Wisconsin

Get insights into the airlines that provide service to Wisconsin. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Wisconsin. Reviews last updated June 21, 2026.
Read reviews from past customers who have flown Southwest,Delta, andUnited Airlines from Ontario to Wisconsin. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Entertainment

7.5

Overall

7.9

Comfort

8.0

Boarding

8.1

Food

7.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

La Tracimeldamarcos,Jun 2026

LAX - SLC

The second flight was not as comfortable as the first as we had to change planes to what seemed to be a slightly older aircraft. The seats weren’t as comfortable as the other plane. But it wasn’t bad.

Entertainment

7.5

Overall

7.9

Comfort

8.0

Boarding

8.1

Food

7.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

La Tracimeldamarcos,Jun 2026

LAX - SLC

The second flight was not as comfortable as the first as we had to change planes to what seemed to be a slightly older aircraft. The seats weren’t as comfortable as the other plane. But it wasn’t bad.

Entertainment

7.5

Overall

7.9

Comfort

8.0

Boarding

8.1

Food

7.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

La Tracimeldamarcos,Jun 2026

LAX - SLC

The second flight was not as comfortable as the first as we had to change planes to what seemed to be a slightly older aircraft. The seats weren’t as comfortable as the other plane. But it wasn’t bad.

Entertainment

7.5

Overall

7.9

Comfort

8.0

Boarding

8.1

Food

7.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

La Tracimeldamarcos,Jun 2026

LAX - SLC

The second flight was not as comfortable as the first as we had to change planes to what seemed to be a slightly older aircraft. The seats weren’t as comfortable as the other plane. But it wasn’t bad.

Entertainment

7.5

Overall

7.9

Comfort

8.0

Boarding

8.1

Food

7.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

La Tracimeldamarcos,Jun 2026

LAX - SLC

The second flight was not as comfortable as the first as we had to change planes to what seemed to be a slightly older aircraft. The seats weren’t as comfortable as the other plane. But it wasn’t bad.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Wisconsin. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
  • What airport do you fly from for flights from Ontario to Wisconsin?

    Ontario (ONT), located 3.1 mi from the city center, is the airport you fly out of when you book flights from Ontario to Wisconsin.

  • How long is the flight from Ontario to Wisconsin?

    Frontier, United Airlines, and Delta can get you from Ontario to Wisconsin in just under 4h 15m. Your travel time can differ by up to 2h 09m. Airlines will cover a distance of 1695 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines to fly from Ontario to Wisconsin one-way?

    $138 is the cheapest one-way deal found within the past few days, from Delta. You may also be able to find cheap deals on United Airlines and American Airlines, with prices starting from $144 and $179, respectively.

  • What are the most popular routes from Ontario to Wisconsin?

  • Can I find deals for flights from Ontario to Wisconsin that include hotel bookings?

    Yes. In addition to deals on Ontario to Wisconsin flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to Wisconsin?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Wisconsin.

  • Can I find deals for business class flights from Ontario to Wisconsin?

    Yes. Cheapflights offers flight deals from Ontario to Wisconsin by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Ontario to Wisconsin?

    Currently, June is the cheapest month in which you can book a flight from Ontario to Wisconsin (average of $156). Flying from Ontario to Wisconsin in February is currently the most expensive (average of $369). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Ontario to Wisconsin

See prices for flight routes from nearby airports that may be better suited for you.

Top 4 airlines flying from Ontario to Wisconsin

Discover the top 4 airlines that operate flights from Ontario to Wisconsin. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated June 21, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$276Average$523FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$309Average$516FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$350Average$493FlexibilityNo cancel feeOn-time63%
DeltaCheapest$356Average$476FlexibilityNo cancel feeOn-timeN/A

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